"Frank Z" wrote in message
...

Hi folks,
I need to plaster over a steel lintel over an open fore recess. Its
visible surface is 6" x 31" . It is 1/4" thick steel. The steel will
get fairly hot (I guess about the pemperature of boiling water but not
much more) because it is in close proximity to a fire. That means the
steel may expand and contract somewhat. I'll be using one-coat plaster
from B&Q, and the plaster will be about 6mm thick over the steel. What
is the best way to ensure the plaster stays stuck to the steel? One
idea I had is to rivet a piece of perforated sheet-metal to the steel
before applying the plaster. Any other suggestions would be
appreciated.

Thanks

Frank Z

Perforated plywood is good for this. Make a frame around the lintel and
cover it with the plywood. The perforations lets the plaster ooze through
and when it dries it grips like mad. It's just like an old lath and plaster
wall in a way..


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